Valve.



C. W. DAKE.

VALVE. APPLICATION FILED JUNE 2|. I915.

Patented 11121316, 1916.

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'rra snares para o a CHARLES W. DAKE, OF CHICAGO, ILLINOIS, ASSIGNOB. '10 PYLE-NATI ONAL ELECTRIC HEADLIGHT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

VALVE.

Application filed June 21, 1915.

To all whom it may concern:

Be it known that I, Cnannns W DAKE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Val ves of which the following is a specification.

My invention relates to improvements in valves for turbine engines and the like and has for one object to provide a new and improved form of valve assembly which may be conveniently withdrawn as a unit from its operative position and which may then be subsequently dismounted or assembled for repair and adjustment with a minimum of ditliculty.

Another object is to provide a piston control valve which will be substantially balanced in operation.

Another object is to provide a piston 0011- trol valve which is easily produced and as.

sembled and which is not subject to rapid gearation.

Other objects of my invention will appear from time to time in the specification.

My inventionis illustrated more or less diagrammatically in the accompanying drawings, wherein Figure l is a detail section through a part of the motor generator set showing my device in operation; Fig. 2 is a section on the 1 line 2:2 of Fig. 2 on an enlarged scale with parts in elevation and parts broken away; Fig. 3 is a section on the line 3-3 of'Fig. 2.

Like parts are indicated by like letters throughout the several figures.

A is a motor housing. in it is a valve assembly pocket A This valve assembly pocket A has a conical wall as indicated. In this conicalwall is an annular steam passage A and discharging from one side of it is a feed steam supply passage A This pocket opens up at the top into an enlarged chamher A to which is fed a steam supply through a passage A This chamber is closed by a screw-threaded cap A6. The pocket terminates at the bottom in an opening A containing a governor control arm A adapted to be actuated by any suitable mechanism not here shown in response to the usual governor or other speed control mechanism.

WVhcn the valve and valve socket assembly is withdrawn from the pocket and chamber adapted to contain it there is a free passage Specification of Letters Patent.

Patented May 16, 1916.

Serial No. 35,190.

. pipe to the engine and it is the function of the guide valve and valve pocket assembly to control this passage;

B is a conical valve socket body adapted to seat upon the conical wall of the valve pocket. This body is annularly grooved at at B in register with the passage A The central portion of this body contains a cylindrical chamber 13 terminating at a point slightly below the annular groove 13 This chamber forms a seat for a dumb bell piston valveB These two ends are provided with the usual type of steam or water grooves B". The passages 13 extending inwardly from the groove B to the chamber B are controlled by the lower portion of the valve which in the position shown is open to permit passage of the steam from the cylindrical chamber outwardly through the wall of the socket member.

C is a valve stem. It passes through the valve cylinder and is loosely anchored thereon by a collar C. This collar is held within a pocket inside the lower end of the valve by a sleeve C. This collar is smaller in diameter than the pocket in which it is contained and is held by the sleeve 0 tight enough so that it and the valve stem may move sidewise within the valve. This collar is serrated as at C to permit free passage of the steam along the length of the valve stem and this screw-threaded portion is engaged by a cap D which at its upper end has a bearing closed at the top to guide aiid support the upper end of the valve stem O. This cap is apertured as at D to permit-.hpward movement of the piston valve thcreinto.

D is an annular channel about the periphery oi the cap divided into sections by a series of spacing members'D, thus forming passages to communicate with passages I) through the wall of the reduced portion of the socket thus furnishing a connection pocket A} and the-inside .4 clamp to a slight degree and thus may under some circumstances be-rotated in the reverse direction. This would result in a slight rotation of the inner cap on the socket, thus when the outer cap is withdrawn and the socket taken out, the cap may be easily disassembled by hand and the parts adjusted or set up in any suitable manner. The length of the cylinder valve and the length of the cylinder chamber in the pocket is the same so that the operator can always tell by feeling whether or not the valve is in proper position. If the valve projects up above the end of the socket when the cap is removed, he knows even in the dark that somethingis wrong.

It will be evident that while I have shown in my drawings an operative device, still man chan es mi ht be made both in size shape and arrangement of parts without departing from the spirit of my invention, and I wish, therefore, that my drawings be regarded as in. a sense diagrammatic.

The serrations as indicated are of such depth that even when the collar is snugly held in position inside the valve piston, there is still room for, the passage of the steam through these serrations past the shoulder between which the sleeve is held.

The whole valve assembly is as shown contained within a pocket or socket in the rotor housing. The large holding and closing cap is after the valve ssembly is placed in position, screwed down and holds the valve assembly yieldingly but snugly in position by compressing the helical spring. The spring is twisted one way, the thread another, so that with the parts in the position shown, when a heavy wrench is applied to screw the cap down into position, the spring being spiraled in a direction opposite to the rotation of the cap, will slide freely between it and the cap or top of the valve assembly, and there will be no "idency for the spring to clamp between the two caps and turn the inner one in response to the rotation of the outer one, thus the installation of the valves assembly will not tend to lock the parts together any more closely than they were first locked by the operator. When the big cap is unscrewed, there will. be a tendency possibly to unscrew the inner ca p. This does no harm.

The use and o eration of my invention are as follows Vith the steam turned off at the boiler and the parts removed, the operator would place the already assembled valve socket and assembly in position in the pocket destined to contain them. Hewill. then put the spring in position on top of the cap at the top of the socket and screw down.the outer cap tight, thus making a steam-tight joint. The steam can then be turned on and with the valve in the lower position will pass through and drive the engine. As the engine speeds up and the governor comes into action the piston will raise gradually cutting off at its lower end the supply of steam until under some circumstances the piston might be moved clear up to completely close the steam passage. There is, of course, a certain amount of leakage of steamboth up and down along the valve. This is resisted to a certain extent by the condensation grooves. This steam may pass around into the cylindrical chamber either above or below the valveand once there will pass up or down along the inside of the valve along the valve stem. It cannot get out at the top because the bearing there is closed. It may escape at the bottom along the long valve stem bearing though since this is a snug fit and well oiled not much steam will leak through here. The steam, of course, can get up to the upperend of the valve stem and exert a downward pressure on that end. The pressures are balanced on either end of the valve itself and also between the two enlarged ends so that the valve is balanced all except the cross sectional area of the valve stem and this is not balanced but is so small as to be easily compensated for in the governor by the adj ustment of the governor spring.

The valve assembly may be taken down by unscrewing thenut at the lower end of the valve stem, unscrewing the cap at the upper end of the socket and lifting out the valve driving out the sleeve from the lower end of the valve, withdrawing the valve stem and collar and then driving the collar off the stem. The parts are all preferably made driving fit so thatthey may be assembled or disassembled. on the road.

I claim: I v 1. The combination with a hollow piston valve of a valve stem passing therethrough and projecting from either end thereof, said stem being smaller in diameter than the inside of the valve and being loosely held in position therein.

The combination with a hollow piston valve of a valve stem loosely mounted there in, a pocket within the valve, a. collar on the stem located within said pocket and the sleeve holding said collar in said pocket.

3. The combination with a hollow piston valve of a valve stem loosely mounted theresleeve holding said collar in said pocket,

said stem being held by said sleeve and collar against longitudinal motion with re spect to the valve, but free to move laterally with respect thereto.

4:. The combination with a hollow piston valve of a valve stem passing therethrough and projecting from either end thereof, said stem being smaller in diameter than the inside of the valve and being loosely held in position therein, said collar being "serrated at either end to permit passage of steam through the valve along the valve stem.

5. The combination with a hollow piston valve of a valve stem loosely mounted therein, a pocket within the valve, a collar on the stem located within said pocket and the sleeve holding said collar in said pocket, said collar being serrated at either end to permit passage of steam through the valve along the valve stem.

6. The combination with a hollow piston valve of a valve stem loosely mounted therein, a pocket within the valve, a collar on the stem located within said pocket and the sleeve holding said collar in said pocket, said stem being held by said sleeve and collar against longitudinal motion with respectto the valve, but free to move laterally with respect thereto, said collar'being serrated ateither end to permit passage of steam through the valve along the valve stem.

7. The combination with a cylindrical valve seat of intake and discharge ports communicating therewith and arranged along the axis thereof, a piston valve having.-

enlarged ends in 'slidable engagement with said valve seat and reduced at its center, said ends being located normally one on either side of said ports and means for reciproeating the piston valve to control said ports.

8. The combination with a piston valve and housing of a remo able valve socket in the housing having a cylindrical valveseat therein containing the piston valve, said socket and seat being open at'one end, a removable cap closing the open end of the valve seat and mounted on the socket.

9. The conibinationv'ith a piston valve.

and housing of a removable valve socket in the housing having a cylindrical valve seat therein containing the. piston valve, said socket and seat being open at one end, a removable cap closing the open end of the valve seat and mounted on the socket, a valve stem free to move laterally with respect to the piston valve and projecting therethrough.

'10. The combination with a piston valve of a valve socket having a cylindrical valve seat therein containing the piston valve, said socket and seat being open at one end, a removable cap closing the open end of the valve seat and mounted on the socket, a valve stem free to move laterally with respect to the piston valve 'and projecting therethrough, a bearing in the socket and in the cap for said stem.

of a housing, a pocket therein in which the socket is contained, a cap screw-threaded on 11. The combination with a valve socket l end of the pocket, and a spring interposed between said caps.

12. The combination with a valve socket of a houslng, a pocket therein in which the socket is contained, a cap screw-threaded on v the end of 'the socket, a valve contained within the socket and held in position 'by the cap, a screw-threaded cap to close the open end of the pocket, and a spring interposed between said caps, both of said caps having right-hand screw threads, the spring itself being a left-hand spiral sprlng.

13. The combination with a hollow piston valve having a reduced central portion of a cylindrical valve seat therefor, said seat bemg open at one end, a removable cap closing said open end, a valve stem loosely mounted in the valve, and a loose guiding hearing at the end of the cap, a loose guiding bearing below the va'lve seat for thestem and a free passageway through the valve along said stem from one end of the valve with said valve seat adapted to be controlled by the valve..

In testimony whereof, I afiix my signature in the presence of two witnesses this 18th I the other, Intake and exhaust passages com un cating 

